[英]How to detect event store changes and what is change? From EKEventStoreChangedNotification
how to know whether EKEvent is added or deleted? 如何知道是否添加或删除了EKEvent? so that i can schedule notification for event.
这样我就可以安排活动通知。 otherwise for deleted event also it will schedule a notification.
否则对于已删除的事件,它也会安排通知。 any help?
任何帮助?
-(void)storeChanged:(NSNotification*)notification{
EKEventStore *ekEventStore = notification.object;
NSDate *now = [NSDate date];
NSDateComponents *offsetComponents = [NSDateComponents new];
[offsetComponents setDay:0];
[offsetComponents setMonth:4];
[offsetComponents setYear:0];
NSDate *endDate = [[NSCalendar currentCalendar] dateByAddingComponents:offsetComponents toDate:now options:0];
NSArray *ekEventStoreChangedObjectIDArray = [notification.userInfo objectForKey:@"EKEventStoreChangedObjectIDsUserInfoKey"];
NSPredicate *predicate = [ekEventStore predicateForEventsWithStartDate:now
endDate:endDate
calendars:nil];
// Loop through all events in range
[ekEventStore enumerateEventsMatchingPredicate:predicate usingBlock:^(EKEvent *ekEvent, BOOL *stop) {
// Check this event against each ekObjectID in notification
[ekEventStoreChangedObjectIDArray enumerateObjectsUsingBlock:^(NSString *ekEventStoreChangedObjectID, NSUInteger idx, BOOL *stop) {
NSObject *ekObjectID = [(NSManagedObject *)ekEvent objectID];
if ([ekEventStoreChangedObjectID isEqual:ekObjectID]) {
// Log the event we found and stop (each event should only exist once in store)
NSLog(@"calendarChanged(): Event Changed: title:%@", ekEvent.title);
NSLog(@"%@",ekEvent);
NSInteger total = [[[UIApplication sharedApplication] scheduledLocalNotifications]count];
if (total == 64) {
[self cancelLastNotification];
}
NSArray *newArray = [[NSArray alloc]initWithObjects:ekEvent, nil];
[self scheduleNotificationForCalendarEvents:NO andEvents:newArray];
*stop = YES;
}
}];
}];
}
如果使用refresh
属性,它将在删除时返回false,如果仍然可以使用,则返回true。
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